Blodgett CNV-8G Operating instructions

COS-8G, COS-8GDS, BC S-8G, AND CNV-8G

GAS COOKING APPLIANCES

INSTALLATION -- OPERATION -- MAINTENANCE

COS-8G, COS-8GDS, BCS-8G, ET CNV-8G

APPAREILS DE CUISSON AU GAZ

MANUEL D’INSTALLATION -- FONCTIONNEMENT -- ENTRETIEN

BLODGETT COMBI

www.blodgett.com

44 Lakeside Avenue, Burlington, Vermont 05401 USA Telephone (800) 331-5842, (802) 860-3700 Fax: (802)864-0183

PN R8133 Rev D (6/01)

E 2000 --- Blodgett Combi

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Table of Contents/Table des Matières

Introduction

The Blodgett Combi Cooking Line 2......

Description of the Blodgett Combi

Cooking Line 3.........................

Oven Features 4.......................

Installation

Owner’s Responsibilities 5...............

Location and Ventilation 6...............

Agency Approvals 7....................

Utility Connections 8....................

Optional Leg Attachment 13..............

Baffle Installation 14.....................

Stacking Instructions 15..................

Final Check and Adjustments 17..........

Final Check Lists 18.....................

Operation

Safety Information 19....................

Oven Start-Up 20........................

Combi-Oven/Steamer Standard Controls 21

Optional Combi-Oven/Steamer

Cook & Hold 23.........................

Convection Steamer Standard Controls 26.

Convection Oven Standard Controls 27....

Optional Convection Oven

Cook and Hold 28.......................

Optional Meat Probe 31..................

Maintenance

Spray Bottle Operating Procedure 32......

Cleaning and Preventive Maintenance 33...

Decalcification 34.......................

Introduction

Laligned’appareilsdecuisson

de Blodgett Combi 36....................

Description de la ligne d’appareils de cuis-

son de Blodgett Combi 38................

Caractéristiques 39......................

Installation

Responsabilités du propriétaire 40.........

Placement et Ventilation 41..............

Normes et Codes 42.....................

Branchement U tilitaires 43................

Retenue du Tuyau de Gaz 47.............

Fixation des pieds en Option 48...........

Installation du Déflecteur 49..............

Superposition - Assemblage

section double 50.......................

Vérification finale et derniers réglages 52...

Vérifications Finales 53...................

Utilisation

Informations de Sécurité 55...............

Mise en Marche du Four 56...............

Combi-Four/étuve à Vapeur

Contrôles Standards 57..................

Combi-Four/étuve à Vapeur

Cuisson et Pause en Option 59...........

Combi-Convection/étuve à

Va peur Contrôles Standards 63...........

Combi-Four à Convection

Contrôles Standards 64..................

Combi-Four à Convection

Cuisson et Pause en Option 65...........

Sonde à Viande en Option 69.............

Entretien

Procédé de fonctionnement de la bouteille

vaporisatrice 70.........................

Entretien Préventif et Nettoyage 71........

Détartrage 72...........................

Introduction

2

The Blodgett Combi Cooking Line

For quite some time, commercial cooking equip-

ment has remained more or less unchanged.

There are kettles, deck ovens,the good oldrange

with its legion of pots and many other extra

appliances. The result: t ime expenditure, exces-

sive manual work, and countless cleaning pro -

cesses.Thelastfewyearshavepavedthewayfor

a revolutionint he equipment ofrestaurant a nd in-

stitutionalkitchens. Blodgett Combi is proud to of-

fer three different cooking platforms, one of which

is sure to match your needs. The Blodgett Combi

line includes:

D

The Bl odgett Combi Convection Steamer

D

The Blodgett Combi Convection Oven

D

The Bl odgett Combi-Oven/Steamer

AllBlodgettCombiappliancesimproveyourkitch-

en through:

D

increased productivity

D

a wider range of menu choices

D

a simplified cleaning process

The work process is simplified since products are

prepared on or in steam table pans and trays.

F oodcan be cooked, stored,andtransportedwith

the same pans. Smallamounts ofproduct canbe

processed efficiently; pre-cooked and conve-

nience foods can be reheated w ithin minutes.

COMBI CONVECTION STEAMER

Steaming is a well k nown cooking process fre-

quently used in restaurant and institutional k itch-

ens.WiththeCombiConvectionSteamer,itisnow

possible to enjoy the many advantages of steam-

ing including shorter cook times, higher product

quality and vitamin retention.

TheCombiConvectionSteamer includesa builtin

steamgenerator.Thisunitincludesaninlet,funnel

assembly and valve lever for decalcification.

COMBI CONVECTION OVEN

Cooking in the Combi Convection Oven differs

from cooking in a traditional deck or range oven

sinceheated a iris constantlyrecirculatedoverthe

product by a fan in an enclosed chamber. The

movingaircontinuallystripsaway thelayerofcool

air surrounding the product, quickly allowing the

heattopenetrate.Theresultisa highqualityprod -

uct, cooked at a lower temperature in a shorter

amount of time.

COMBI-OVEN/STEAMER

WiththeOven/Steameryouhavethechoiceoftwo

cooking processes: Steam and Hot Air, either...

D

Separately

D

Combined, or

D

InSequenceusingtwoorthreefunctionsduring

onecookingprocess.Wecallthiscombi-steam -

ing and combi-baking.

F or easy operation you can choose from three

modes:

Steam Hot

A

ir Combi

Steam &

Hot Air

In the Steam mode you can:

D

steam

D

blanch

D

poach

D

defrost

D

rethermalize

In the Hot Air mode you can

D

roast

D

bake

D

braise

In the Combi mode you can:

D

defrost

D

roast

D

rethermalize

D

reheat

D

bake

D

sous vide*

D

proof*

D

cook & hold*

* with optional digital controls

The Combi- O ven/Steamer is offered in two models,

each with different steam producing systems.

D

The COS-8G model includes a built in steam

generator. This unit includes an inlet, funnelas-

sembly and valve lever for decalcification.

D

The COS-8GDS is a direct steam unit that is

connected to an external steam s ource.

Introduction

3

Description of the Blodgett Combi Cooking Line

ABOUT THE COMBI LINE

Blodgett Combi appliances are quality produced

using high-grade stainless steel with first class

workmanship.

The use of high quality insulation impedes exces-

sive heat radiation and saves energy.

Optional adjustable legs adapt easily to slightly

unevensurfaces. Optionalfloorstands have been

designed for use with all of the table models.

Oven/Steamers and Convection Steamers

The high performance steam control system

makes it possible to enjoyall ofthe advantages of

ahighquality steamerattheflickofa switch.Fresh

steamenterstheovencavitywithoutpressureand

is circulated at high speed. This process enables

quickandgentlecookingandensureshighquality

productwhileprovidingconvenient workingmeth-

ods.

Apatentedquenchsystemkeepstheairintheunit

clean. Fumes are extracted from the appliance,

quenched,anddirectedoutthroughthecondens-

er drain. The exhaust system is effective in all

cooking modes and results in better quality foods

and no flavor transfer. The fan, which is guarded

against a ccidental finger contact, is driven by a

quiet a nd powerful motor. The condenser draws

out excess steam from the appliance. Condensa-

tion and waste water, which result during steam -

ing and cleaning, are continuously drained.

OPERATION

The practical oven door, with a viewing window,

has a wide swingradius and handle which can be

operated easily, even w ith wet or greasy hands.

Ease of operation is guaranteed through the sim-

plearrangement of the controls. Graphicsymbols

make the appliances easy for even inexperienced

kitchenstafftooperate.Allmodescanbes elected

with one switch. This includes the Cool Down

mode, w hich allows the oven cavity to cool down

rapidly with the door opened or closed.

Cleaningiskepttoaminimum.Theinteriorcanbe

sprayed with a cleaning solution to easily remove

crusts and stains. The oven is designed for easy

care and is welded water tight so that the internal

cooking cavity may be rinsed with a hose after the

cleaning process.

Introduction

4

Oven Features

Standard Features

1

4

2

3

6

7

5

8

COS-8G Shown

9

10

Figure 1

1

Control Panel

2 Oven Door

3 Drip Collector (self draining)

4 Door Handle

5 V ent (not shown)

6 Decalcifying Inlet & Funnel Assembly*

7 Decalcifying V alve Lever*

8 Gas Shut Off Valve

9 Tilt Down Panel Screw

10 Removeable plugs provide access to

screws securing drip collector

* only on COS-8G and BCS-8G

Installation

5

Owner’s Responsibilities

1. Oven(s)areuncrated, stack ed (ifapplies)and

put in place.

NOTE: Refer to Leg Attachment and Stacking

information provided.

2. The owner/operator must have the following

plumbing, electrical and gas requirements

met and installed.

NOTE: Refer to the Utility Connection infor-

mation provided.

WARNING!!

Improper installation, adjustment, alter-

ation service or maintenance can cause

property dama ge, injury or dea th. Read

the installation, operation and mainte-

nance instruction thoroughly before in-

stalling or servicing this equipment.

ELECTRICAL

15 amp Nema 5-15 grounded outlet

PLUMBING

Water

Water Pressure (min/max) 50 PSI (345 k Pa)

Cold Water Supply 3/4” Hose Fitting, 3/8” ID hose minimum

Hot Water Supply* 3/4” Hose Fitting*, 3/8” ID hose minimum

Drainage Atmospheric Vented D rain

Drain Connection 2” Copper

Average Water Drain Temperature 122_F/50_C

GAS PRESSURE

Orifice at Sea Level

Steam #13/64 (.203” dia) natural gas

Hot Air #54 (.055” dia) natural gas

Inlet Pressure to the Unit

Natural Gas 7---14” WC (1.74---3.48 kPa)

Propane 12---14” WC (2.98---3.48 kPa)

Pressure at the Manifold

Natural Gas 3.5” WC (.87 kPa)

Propane 10” WC (2.49 kPa)

*Not applicable with COS-8GDS and C NV-8G

Installation

6

Location and Ventilation

LOCATION

The well planned and proper placement of your

appliance will result in long term operator conve-

nience and satisfactory performance.

The foll owing clearances must be maintained be-

tween the unit, including hose assemblies, and any

combustibl e or non- combusti bl e constructio n.

D

Ovens with casters --- 6” (15 cm)

D

Ovens without casters --- 12” (30 cm)

The following clearances are recommended, but

not required, for servicing.

D

Oven body sides --- 12” (30 cm)

D

Oven body back --- 12” (30 cm)

Pl ace the unit in an area which is free of drafts and

accessible for proper operation and servicing.

Keep the oven a rea free and clear of all combus-

tibles such as paper, cardboard, and flammable

liquids and solvents.

DO NOT place the oven on a curb base or seal to

the wall; either condition will prevent proper venti-

lationtotheblowermotors.Slightunevennesscan

be corrected w ith the adjustable legs.

The air vents on the left side of the unit must be

protected from heat and steam or water sources.

Consult the factory for an optional protective side

heat shield kit if excessive ambient heat or steam

is present on the left side of the unit.

D

COS-8G heat s h ield P/N R4514

D

COS-8GDS heat shield P/N R4514

D

BCS-8G heat shield P/N R4514

D

CNV-8G heat shield P/N R4514

Onallmodels, trippingtheblower motor’sthermal

overload device indicates an excessive ambient

temperature at the back ofthe oven. This must be

corrected to prevent permanent damage to the

oven. All motor bearings are permanently lubri-

cated by the manufacturer; there is no need for

additional lubrication during the operational life-

time of the motors.

VENTILATION

The n ecessity for a properly designed and in -

stalled ventilation system cannot be over empha-

sized. The ventilation system will allow the unit to

function properly while removing unwanted va-

porsand productsof combustionfromtheoperat-

ing area.

The a ppliance must be vented with a properlyde-

signed mechanically driven exhaust h ood. The

hood should be sized to completely cover the

equipmentplus an overhang ofat least 6”(15 cm)

on all sides not adjacent to a wall. The capacityof

the hood should be sized appropriately andprovi-

sions made for adequate makeup air.

WARNING!!

Failure to properly vent the oven can be

hazardous to the health of the operator;

and will result in operational problems,

unsatisfactory baking,and possibledam-

age to the equipment. Da mage sustained

as a direct resul t of improper ventilation

will not be covered by the Manufacturer’s

warranty.

U.S. and Canadian Installations

Refer to your local ventilation codes. In the ab-

sence of local codes, refer to the Nationalventila-

tion code titled, “Standard for the Installation of

Equipment for the Removal of Smoke and Grease

Laden Vapors from Commercial Cooking Equip-

ment”, NFPA-96- Latest Edition.

General Export Installa tions

Installation must conform with Local and National

installation standards. Local installation codes

and/or requirements may vary. If you have any

questionsregardingthe proper installationand/or

operation of your unit, please contact your local

distributor. If you do not have a local distributor,

pleasecallBlodgettCombiat0011-802-860-3700.

Installation

7

Agency Approvals

THE INSTALLATION INSTRUCTIONS CON-

TAINED HEREIN ARE FOR THE USE OF QUALI-

FIEDINSTALLATIONANDSERVICEPERSONNEL

ONLY. INSTALLATION OR SERVICE BY OTHER

THAN QUALIFIED PERSONNEL MAY RESULT IN

DAMAGE TO THE OVEN AND/OR INJURY TO

THE OPERATOR.

Qualified installation personnel are individuals, a

firm, a corporation, or a company which either in

person or through a representative are engaged

in, and are responsible for:

D

The installation or replacement of gas piping.

The connection, installation, repair or servicing

of equipment.

D

Theinstallationofelectricalw iringfromtheelec-

tric meter, main control box or service outlet to

the electric appliance.

Qualified installation personnel must be experi-

enced in such work, be familiar with all precau-

tions required and have complied with all require-

ments of state or local authorities having

jurisdiction.

U.S. and Canadian Installations

Installation must conform with local codes, or in

the absence of local codes, with the National Fuel

Gas Code, NFPA54/ANSI Z223.1---Latest Edition,

the Natural Gas Installation Code CAN/CGA-

B149.1 or the Propane Installation Code, CAN/

CGA-B149.2 as applicable.

Reference: National Electrical Code, ANSI/NFPA

70---Latest Edition and/or Canadian Electrical

Code CSA C22.1 as applicable.

This equipment is to be installed in compliance

withthe Basic Plumbing Code of the Building Offi-

cials and Code Administrators International Inc.

(BOCA)and theFood ServiceSanitation Manualof

the Food and Drug Administration (FDA).

General Export Installa tions

Installation must conform with Local and National

installation standards. Local installation codes

and/or requirements may vary. If you have any

questionsregardingthe proper installationand/or

operation of your unit, please contact your local

distributor. If you do not have a local distributor,

pleasecallBlodgettCombiat0011-802-860-3700.

Installation

8

Utility Connections

HOT AND COLD WATER CONNECTION

NOTE: Hot wat er maximizes stea m productio n but

is notrequired.Cold wate rmay be supplied

to both inlet s if hot wat er is not availa ble.

COS-8G and BCS-8G --- Connect the appliance to

quali tycoldwater via a pressure hosewith 3/4” cou-

plings. Cold water is connected to the left soleno id/

pressure regulato r, as viewed from the rear of the

unit. Hot water connectio n, right soleno id/pressure

regulator, to the boi l er is recommended. Shut off

valv es must be provi ded adjacent to the oven.

COS-8GDS and CNV-8G --- Connect these units

to quality cold water via a pressure hose with 3/4”

couplings.

1/2” appliance hose

With 3/4” hose fittings

Figure 2

Water must meet the following minimum require -

ments:

D

Total Dissolved Solids (TDS) content will not ex-

ceed 30 parts per million.

D

Water PH must be 7. 0 or higher

WARNING!!

The use of poor quality water will invali-

date your warranty.

DRAIN CONNECTION

A 2” (5 cm) copper pipe with standard drain pitch

mustberuntoanopendrainorconnectedtoa

standpipe equipped with a vent.

NOTE: Thewaste water canalso be directed to a

nearby floor drain. Flexible hose which al-

lows trapped water to accumulate in

sagged runs must be avoided.

1. Find the drain connections on the lower rear

of the unit.

2. Using the band coupling provided, attach

coupling clamps to the drain connection.

3. Create the drip pan drain connection a s

shown. A separate drain connection for the

drip pan is also possible.

NOTE: The open end of the drain should be

insta lle d facin g the floor. Copper line used

for installation to an open drain or floor sink

must be supplied by th e installe r.

CAUTION! Use of an inline trap will causedrain

backup

Drip pan drain

1” air gap

Plumber supplied

breather vent and tee

Main drain

Plumber supplied

connection to lower unit

or drain system

Figure 3

Installation

9

Utility Connections

STEAM CONNECTION

NOTE: COS-8GDS only.

Connect the appliance to a 200 psi maximum ex-

ternal steam s ource per local or state codes. The

steam must be clean, potable and fit for human

consumption. Failure to connect this appliance t o

asuitablesteamsourcewillrevoketheapprovalof

NSF.

ELECTRICAL CONNECTION

Beforemakinganyelectricalconnections tothese

units, check that the powersupplyis adequatefor

the voltage, a mperage, and phase requirements

stated on the rating name plate mounted on the

unit.

Wiring diagrams are located on the inside of the

louvered side panel.

All units are equipped for operation on 115V 15

amp 1Φ 60Hz., 2 conductor cable with ground.

Wiring from the power source to this unit must be

aminimum of#16 AWGCU.strandedwire or larg-

er.

NOTE: DISCONNECT THE POWER SUPPLY TO

THEUNITBEFORESERVICING!

WARNING!!

This appl iance is equipped with a 115V,

three-prong (grounding) plug for your

protection against shock hazard and

shouldbepluggeddirectlyintoaproperly

grounded three-prong receptacle. DO

NOT cut or remove the grounding prong

from this plug.

U.S. and Canadian installation

All units, when installed, must be electrically

groundedinaccordance withlocal codesorinthe

absenceoflocalcodes,withtheNationalElectrical

Code, ANSI/NFPA70---Latest Edition and/or Cana-

dian Electrical Code CSA C22.1 as applicable.

General Export Installa tions

Installation must conform with Local and National

installation standards. Local installation codes

and/or requirements may vary. If you have any

questionsregardingthe proper installationand/or

operation of your unit, please contact your local

distributor. If you do not have a local distributor,

pleasecallBlodgettCombiat0011-802-860-3700.

WARNING!!

Improper electrical installation will invali-

date your warranty.

Installation

10

Utility Connections

GAS PIPING

Aproperlysizedgas supplysystemisessentialfor

maximum oven performance. Piping should be

sized to provide a supply of gas sufficient to meet

themaximumdemandofallappliancesontheline

without loss of pressure at the equipment.

Example:

NOTE: BTU values in the following example are

for natural gas.

You purchase a COS-8G to add to your existing

cook line.

1. AddtheBTUratingofyourcurrentappliances.

Pitco Fryer 120,000 BTU

6 Burner Range 60,000 BTU

Deck Oven 50,000 BTU

Total 230,000 BTU

2. Add the BTU rating of the new oven t o the to-

tal.

Previous Total 230,000 BTU

COS-8G (for steam) 90,000 BTU

New Total 320,000 BTU

3. Measure t he distance from the gas meter to

the cook line.This is the pipelength. Let’ssay

thepipelengthis30’(9m)andthepipesize

is 1” (2.54 cm).

4. Usethe appropriatetable todetermine the to-

tal capacity of your current gas piping.

The total capacity for this example is 375,000

BTU. Since t he total required gas pressure,

320,000 BTU is less tha n 375,000 BTU, the

current gas piping will not have to be in-

creased.

NOTE: TheBTU capacities given in thetablesare

for straight pipe lengths only. Any elbows

orother fittings will decreasepipecapaci-

ties. For example: a schedule 40 1- 1/2”ell

fitting has an equivalent capacity of 4.2”

(10.2cm)ofstraightpipe.Contactyourlo-

cal gas supplierif youhaveanyquestions.

Maximum Capacity of Iron Pipe in Cubic Feet

of Natural Gas Per Hour

(Pressure drop of 0.5 Inch W.C.)

Pipe

L

e

n

g

t

h

Nominal Size, Inches

L

eng

t

h

(ft)

3/4” 1” 1-1/4” 1-1/2” 2”

10 360 680 1400 2100 3950

20 250 465 950 1460 2750

30 200 375 770 1180 2200

40 170 320 660 990 1900

50 151 285 580 900 1680

60 138 260 530 810 1520

70 125 240 490 750 1400

80 118 220 460 690 1300

90 110 205 430 650 1220

100 103 195 400 620 1150

From the National Fuel Gas Code Part 10 Table 10-2

Maximum Capacity of Pipe in Thousands of

BTU/hr of Undiluted P.P. Gas at 11” W.C.

(Pressure drop of 0.5 Inch W.C.)

Pipe Length

(

f

t

)

Inside Diameter, Inches

p

g

(ft)

3/4” 1” 1-1/2”

10 608 1146 3525

20 418 788 2423

30 336 632 1946

40 287 541 1665

50 255 480 1476

60 231 435 1337

70 215 404 1241

80 198 372 1144

90 187 351 1079

100 175 330 1014

From the National Fuel Gas Code Part 10 Table 10-15

Installation

11

Utility Connections

PRESSURE REGULATION AND TESTING

The gas pressure to the appliance must be rated

for 7” W.C. for natural gas and 12---14” W.C. for

propane gas for each unit while the burners are

on. A sufficient gas pressure must be present at

the inlet to satisfy these conditions.

Eachunithasbeenadjustedatthefactorytooper -

ate w ith the type of gas specified on the rating

plate attached to the right side of the unit.

Each oven is supplied with a regulator to maintain

the propergas pressure. The regulator isessen-

tial to the proper operation of the oven and

shouldnotberemoved.Itispresettoprovidethe

oven with 3.5”W.C. (0.87 kPa) for natural gas and

10.0” W.C. (2.50 kPa) for Propane while t he flame

is on.

DO NOT INSTALL AN ADDITIONAL REGULATOR

WHERE THE UNIT CONNECTS TO THE GAS

SUPPLY UNLESS THE INLET PRESSURE IS

GREATER THAN 14” W.C. (1/2 PSI)

The oven and its individual shutoff valve must be

disconnected from the gas supply piping system

during any pressure testing of that system at test

pressuresinexcessof1/2psig(3.45kPa).

The oven must be isolated from the gas supply

piping system by closing its individual manual

shutoff valve during any pressure testing of the

gas piping system at test pressures equal or less

than 1/2 psig (3.45kPa).

Prior to connecting the unit, gas lines should be

thoroughly purged of all metal filings, shavings,

pipedope, andother debris.After connection,the

unit should be checked for correct gas pressure.

U.S. and Canadian installations

Installation must conform with local codes, or in

the absence of local codes, with the National Fuel

Gas Code, NFPA54/ANSI Z223.1---Latest Edition,

the Natural Gas Installation Code CAN/CGA-

B149.1 or the Propane Installation Code, CAN/

CGA-B149.2 as applicable.

General Export Installa tions

Installation must conform with Local and National

installation standards. Local installation codes

and/or requirements may vary. If you have any

questionsregardingthe proper installationand/or

operation of your unit, please contact your local

distributor. If you do not have a local distributor,

pleasecallBlodgettCombiat0011-802-860-3700.

Installation

12

Gas Hose Restraint

If the unit is mounted on casters, a commercial

flexible connector with a minimum of 3/4” (1.9cm)

inside diameter must be used along with a quick

connect device.

Therestraint,suppliedwiththeappliance,mustbe

used to limit the movement of the unit so that no

strain is placed upon the flexible connector. The

restraint should be fastened to the base frame of

the ovenas close tothe flexibleconnector as pos -

sible. It should be short enough to prevent any

strain on the connector. With the restraint fully

stretched the connector should be easy to install

and quick connect.

Therestraint(ie:heavygaugecable)shouldbeat-

tached without damaging the building. DO NOT

use the gas piping or electrical conduit for the at-

tachment of the permanent end of the restraint!

Use anchorboltsin concrete or cement block.On

wooden walls, drive hi test wood lag screws into

the studs of the w all.

WARNING!!

If the restraint is disconnected for any

reaso n it must be reconnected when the

unit is returned to its original p osition.

U.S. and Canadian installations

The connector must comply with the Standard for

Connectors for Movable Gas Appliances, ANSI

Z21.69 or Connectors For Moveable Gas Ap-

pliances CAN/CGA-6.16 and a quick disconnect

device that complies w ith the Standard for Quick-

Disconnect Devices for Us e With Gas Fuel, ANSI

Z21.41or QuickDisconnectFor UseWithGasFuel

CAN 1-6.9. Adequate means must be provided to

limit the movement of the a ppliance without de-

pending on t he connection and the quick discon -

nect device or its associated piping.

A drip leg must be used at each appliance. Refer

to NFPA54/ANSI Z223.1 - Latest Edition (National

Fuel Gas Code) for proper drip leg installation.

General export installations

Installation must conform with Local and National

installation standards. Local installation codes

and/or requirements may vary. If you have any

questionsregardingthe proper installationand/or

operation of your unit, please contact your local

distributor. If you do not have a local distributor,

pleasecallBlodgettCombiat0011-802-860-3700.

Gas Supply Line

Gas Hose

Quick Connect

Installation of Gas Hose and Restraint

Attachment Plate

(secure with leg mount bolt)

IMPORTANT: Cable restraint should

be fastened as close as possible to the

flexibleconnectorandshortenoughto

prevent any strain on the flexible con-

nector.

At maximum stretch of shortened re-

straint, the flexible connector should

beeasytoinstallandquicktoconnect.

Restraint

Figure 4

Installation

13

Optional Leg Attachment

LEG OPTIONS

Legs are available in 4” (10 cm), 6” (15 cm) or 25”

(64 cm) lengths or low profile casters. The 4” legs

are for counter top installations. The 6” legs are

usedonthelowersectionofadoublestackedunit.

The 25” legs are used for a single oven located on

the floor.

NOTE: For safety reasons, casters must not be

used with the 25” (64 cm) legs.

25“ (64 cm) Adjustable Leg

4” (10 cm) Leg

6” (15 cm) Adjustable Leg

Low Profile Casters

Figure 5

LEG ATTACHMENT

NOTE: If low profile casters are used, install the

locking casters on the front of the oven.

The rear casters do not lock. Be sure the

locks are set on the front casters.

1. Alignthethreadedstudtheeachlegtothebolt

holes located in the unit’s bottom corners.

Turn the legs clockwise and tighten to the

nearest full turn.

2. Align the leg plate holes with the bolt holes.

Secure with the two 1/2” bolts provided.

3. Tip the oven up on the legs. If casters are

used, check that the locks are set on the front

casters.

4. Exceptforunitswithcasters, leveltheovenby

screwing the adjustable feet in or out as nec-

essary.

6” (15 cm) Legs Shown

Figure 6

Installation

14

Baffle Installation

NOTE: Does not apply to BCS-8G convection

steamer.

1. Insertabaffleintoeachheatexchangetubeas

shown. There are eight baffles per oven. The

baffles are packed in a carton inside the oven

cavity.

NOTE: Thebaffle support pin should be rest-

ing on top of the heat exchange tube

when the baffle is fully inserted.

WARNING!!

Failure to install the baffles will result in

reduced heating efficiency of the oven.

Support Pin

Baffle

COS-8G Shown

Figure 7

Installation

15

Stacking Instructions

STACKING

1. Install6”(15cm)legsorcastersonthebottom

unit, using the three 1/2” bolts provided. If

castersareused, besure that the casterswith

brakesarelocatedonthefrontoftheovenand

the gas hose restraint has been installed.

2. Oven/Steamers and Convecti on Ovens only

Install a baffle (8 per unit) into each heat ex-

change tube on both top and bottom units.

NOTE: For installation of convection steamers

proceed to step 3.

DO NOT remove

body top

Caster with brakes

Baffle (not applicable for

Convection Steamers)

Figure 8

3. Lift and mount the upper unit onto the lower

unit.Flushtheedgesonallfoursides.Remove

the side panel and body back of both units.

Save the screws. Remove the lower body

back from the top unit.

Remove body back

Remove

lower body back

Remove body back

Remove

louvered panel

Remove

louvered panel

Figure 9

4. COS-8G and BCS-8G only --- Remove the

upperunit’ssteamgeneratorflue bottomcap.

Install the steam generator flue adapter be-

tween the lower and upper units’ steam gen-

erator.

NOTE: For convection ovens (CNV-8G) and

direct steam units (COS-8GDS) pro-

ceed to step 5.

Remove plug

Install adapter flue

Figure 10

5. Bolt the upper and lower units together using

the 1/2” bolts provided.

Bolt through holes

closest to oven center

Rear view of oven

Figure 11

Installation

16

Stacking Instructions

FLUE INSTALLATION

NOTE: Convection Steamers do not require tran-

sition and vertical flues. If installing a Con-

vection Steamer proceed to Plumbing.

1. Install the transition flues between the units.

Use three 10-24 screws to attach each flue to

the lower unit’s body top. Reattach the body

backs to the appropriate units. Secure the

transition flues to the lower bodyback using

the sheet metal screw s provided.

Attach with three

10-24 screws at base

of transition flue

Secure the transition flues

to the lower bodyback

using sheet metal screws

Transition flue

2. Install vertical flues using sheet metal screws

provided. D rill through the body back of the

top unit using the verticalflue mounting holes

as pilot holes. Attach the vertical flues to the

body back using sheet metal screws provided.

Attach flue cap to the upper unit.

Attach the vertical

flues to the body

back using sheet

metal screws

Vertical flue

Flue cap

Figure 12

PLUMBING

NOTE: Theinstallationplumberis responsiblefor

connection to the drain. Use a 24” se ction

onthetopunitTeetoraisethebreathervent.

NOTE: DO NOT manifold the drains together

when stacking a C NV-8G with a COS-8G ,

BCS-8G or COS-8GDS.

1. Attach copper Tee, gray hose and clamps to

the drain outlet of both units.

2. Install s uitable t ubing to the floor drain from

the drip pan outlet on the rear of the unit.

Breather vent

Plumber installed

connection 24” long

Tee, hose and clamps

Plumber installed

connection

Tee, hose and clamps

Plumber installed

connection to drain

Figure 13

Installation

17

Final Check and Adjustments

BEFORESWITCHINGTHEAPPLIANCEON

Beforeapplying power tothe unit forthe firsttime,

check for the following conditions:

j All electrical safety provisions have been ad-

hered to a nd the electrical connections are

correct.

j Water is connected, turned on and all of the

connections are water tight.

j Check all gas fittings at the site with leak

detection solution.

NOTE: COS-8G and BCS-8G units only --- The

first time the unit is turned on, or after the

unit has been OFF for 5 hours and then

turned on, it will automatically flush the

steam generator for a period of 75 sec-

onds. The steam generator will then fill to

the proper water level. The unit is now

ready for operation.

DOOR ADJUSTMENT

The doorcatch maybe adjustedin twodirections,

in and out, and up and down, using the following

procedure:

1. Adjust catch up and down by loosening t he

two bolts holding the catch to the face of the

unit (A).

2. Make adjustments so that the leading face of

the catch is centered in the opening of the

handle assembly.

3. Tighten the bolts so that there is no further

movement.

4. Adjust catch in and out by loosening the bolt

on the top of the catch (B).

5. The adjustment face is stepped so that move-

ment is limited with the bolt tightened properly.

6. The adjustment is correct when the door closes

firml y and no steam leaks from the gasket.

The hinges can also be adjusted as follows:

1. Be certain the catch is adjusted properly.

2. Adjust hinges so that the door back and the

unit face are parallel (C).

3. The adjustment is correct when no steam

leaks through the gasket.

COS-8G shown

C

Oven

Door

A

B

Figure 14

Installation

18

Final Check Lists

ELECTRICAL CONTROL COMPARTMENT

115 volt single phase to unit.

j Remove side panel

j Reset high limit thermostats

j Check fuses

j Reinstall side panel

PLUMBING FINAL CHECK

j Incoming water pressure within 50 PSI (mini-

mum)

j Water s olenoids are properly bracketed and

not leaking

j 24”atmosphericstandpipevent/drainproper-

ly installed

j Water feed lines intact without leaks

j Spray hose connected properly

Washer

Fill

Solenoid

Hose and Spray

Washer

Regulator Assembly

“Y” Fitting

Cold water supply

Spray Hose Connection

Figure 15

GAS FINAL CHECK

j Inletpressurestot heappliancea re7---14”WC

forNaturalgasor12---14”WCforPropanegas

j Manifold pressures are 3.5” WC for Natural

gas or 10.0” WC for Propane gas

j Gas line properly secured

j Check for leaks using leak detection solution

j Units with casters must use the gas hose re-

straint provided with the flexible hose

OVEN OPERATIONAL TESTS

NOTE: Checkstobemadebycustomerorautho-

rized service agent.

Cool Down Mode (if applicable)

j Turn Switch to COOL DOWN positi on and verif y

that the motor operates with the door open.

Combi Mode (if applicable)

Turn to COMBI mode, set thermostat to 350_F

(177_C) and verify:

j Steam generator flushes and fill s

j Steam generator preheats to 175_F(79_C)

then sw itches to hot air

j When hot air reaches 350_F (177_C) hot air

shuts off and steam comes on

Steam Mode (if applicable)

Remove control panel, set to STEAM mode and

verify:

j Check timer operation in both positions

1. Set timer in position other than ON, timer

should count down

2. Set timer in ON position, oven should op-

erate continuously without timer

j Run light (power light) turns on

j Unit produces steam, window fogs, door seal

does not leak

j Quenching system working

Hot Air Mode (if applicable)

Turn to HOT AIR mode and set thermostat to

400_F (205_C) and verify:

j Heat demand light is on

j Oven is heating properly

j Heat lights shuts off at 400_F (205_C) and

oven maintains 400_F (205_C)

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